Pi - Cyclical operation pulse first. Independent settings of T1 and T2 intervals. Possibility of turninig on or omitting T3 time.
Turning on feeding voltage U starts cyclic work from turning on the operating relay R for the T1 time, after which occurs turning off of the operating relay R for T2 time. Cyclic work lasts until the moment of turning off feeding voltage.
Relays performing the function "Pi": MT-W...
